Ability to run a command from a template without bash

[charlieok]

One of the main attractions of mise in a windows environment is that it isn't built around bash like, say, direnv is. Its polyglot ethos, positioning it as a sort of Switzerland allowing use of any OS or shell is a very welcome thing. One exception I ran into to that though, was running a command from a Tera template in a mise.local.toml file.

In general, running an arbitrary command from a template in mise.local.toml feels like a kludge I'd prefer to avoid, but it can be handy in a pinch. In my case, I wanted an environment variable to contain the hash of the latest commit in a git repository, so being able to stick a "git rev-parse" command in a template was handy.

In doing that, I saw that it was invoking bash in order to accomplish this.

https://github.com/jdx/mise/blob/v2025.3.2/src/tera.rs#L327

On windows, bash is not necessarily present. Or if it is, running bash will likely involve spinning up a WSL virtual machine.

I'm hoping for a way to invoke a command in a way that does not create a project dependency on bash.

Allowing direct command invocation via syscall could be one way to do this.